BBC's Granite Harbour season 3 premieres July 23, 2026

The third season of the BBC detective drama "Granite Harbour" premiered on July 23, 2026, launching a new three-part murder mystery set against the backdrop of Aberdeen. The series, which first aired in 2022, sees the return of the Major Investigation Team as they investigate the death of a teenager, a case that threatens to expose long-buried secrets and divide a local community.

The new season focuses on the murder of Lisa Sterling, a teenage café worker whose body is discovered at the bottom of a ravine on a prestigious estate after she attended a birthday party for Rose Gough, the matriarch of a local traveller community. What initially appears to be a tragic accident is quickly confirmed as murder, drawing DCI Cora MacMillan and her team into a complex investigation. The estate's landowner, the seemingly benevolent Richard Loughty, becomes a figure of interest as detectives uncover unsettling events on his property.

Returning cast members reprise their roles amid significant personal and professional developments. Dawn Steele returns as DCI Cora MacMillan, who is described as having mellowed following the events of the previous season. Her character is simultaneously...